Method for treating organs subject to erosion by liquids and anti-erosion coating alloy

Abstract

The present invention relates to a method for treating organs subject to erosion by liquids, in particular vapour turbine components, which contemplates laser plating with a cobalt-based alloy comprising chromium from 28 to 32% by weight; tungsten from 5 to 7% by weight; silicon from 0.1 to 2% by weight; carbon from 1.2 to 1.7% by weight; nickel from 0.5 to 3% by weight; iron from 0.01 to 1% by weight; manganese from 0.01 to 1% by weight; molybdenum from 0.2 to 1% by weight; possible impurities or other elements from 0 to 0.5% by weight and cobalt the complement to 100%.

1. A cobalt-based alloy for the coating of organs subject to erosion by liquids, comprising:
                                       chromium   30%   by weight;         tungsten   6%   by weight;         silicon   1%   by weight;         carbon   1.5%   by weight;         nickel   1.8%   by weight;         iron   0.5%   by weight;         manganese   0.3%   by weight;         molybdenum   0.3%   by weight;                       cobalt   Balance;                           other   0.05%   by weight.                                                  
 
     
     
       2. An organ or end-product subject to erosion by liquids, comprising a surface coating layer to prevent erosion from liquids based on an alloy according to  claim 1 . 
     
     
       3. The organ or end-product according to  claim 2 , wherein it is a component of a vapour turbine. 
     
     
       4. The organ or end-product according to  claim 3 , wherein said component is a blade of a vapour turbine. 
     
     
       5. The organ or end-product according to  claim 2 , wherein said surface coating has a thickness ranging from 0.1 to 5 mm.